Boxer oz9668

 

Boxer - plan thumbnail image

Boxer - completed model photo

Submitted to Outerzone: 07/01/2018
Outerzone planID: oz9668 | Filesize: 777KB | Format: • PDFbitmap | Credit*: Circlip, RFJ

   

About this Plan

Boxer - Radio control sport model for .19 power and 3 channel radio. Features cardboard construction.

Quote: "Second part of a construction series using cardboard and foam.

LAST month I covered the possibilities, techniques and practicalities of using cardboard as a structural material for model aircraft. Hopefully that article has gone some way towards dispelling the myth that any such model will suffer not only from a 'droop snoot' but a droop everything else. If there are still doubts in your mind, perhaps because last month's model was basically a trainer with a slow, steady and stable performance, I hope to dispel them this month.

'Boxer' has been designed as an acrobatic model for three function operation on rudder, elevator, and engine only. The plan presented here is for the fourth version of Boxer. Previous versions have all been of built up construction and utilising the wings from a Ripmax Superbipe (one at a time of course). The first model in the series featured a radial engine mount which could be readily un-bolted and replaced with a stream-lined nose block for slope soaring. The throttle servo was then utilised to operate a release system for some early attempts (highly suc-cessful I might add) at aero-towing.

Boxer No. 1 proved quite aerobatic but a more positive rudder control was felt to be necessary. Mk II incorporated an underfin and full depth rudder, also reduced tailplane area. These modifications together with slightly reduced dihedral transformed the performance of the model. Consecutive axial rolls, flick rolls, full power spins and 'rudder reversal' when inverted, all combined to produce a model which completely fulfilled the design parameters. Many who inspected the model on the ground after witnessing its violent aerobatics were amazed at the lack of ailerons, the aerobatic performance particularly in the rolling plane was to say the least sparkling. This is not a model for the novice. It is a 'fun' model for 2 or 3 function R/C suitable for someone who has quite a few solo hours on a basic trainer.

Construction: I recently obtained a few pieces of a new (to British modellers) material called `Rohacell', which I believe to be a rigid acrylic foam. The opportunity was taken of using this material for the tail surfaces and other 'block' areas of Boxer since it is very light but quite strong. It may be remembered from last months article that the all cardboard tail used was too heavy and several ounces of nose-weight were required to achieve the correct balance point..."

Boxer, RCM&E, October 1977.

Direct submission to Outerzone.

Supplementary files

Article pages, thanks to RFJ.

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oz9668 datafile

Boxer  
by Chrs Pinchbeck, Bill Burkinshaw
from RCME
October 1977 
50in span
Tags: IC R/C
all formers complete :)
got article :)

 

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Notes

* Credit field

The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.

Scaling

This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.

 

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